FAW J6P Fuel Fine Filter: Deconstructing 4 Critical Parts for Absolute HPCR Protection

Welcome to this expert deconstruction of the FAW J6P Fuel Fine Filter (Main Assy P/N 1117010-73D). This is the “polishing” filter for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck’s engine.

This is not the primary fuel filter/water separator. This is the *final*, high-efficiency “Logic Assembly” that provides the last line of defense for the engine’s most expensive components.

The “logic” of this FAW J6P Fuel Fine Filter is “Absolute Purity.” Its sole function is to remove microscopic particulate matter (down to 2-5 microns) that the primary filter cannot, protecting the high-pressure pump and injectors from abrasive wear.

The “HPCR Protection Logic” is the key to this FAW J6P Fuel Fine Filter. A High-Pressure Common Rail (HPCR) system (like the one on this FAW engine) operates with internal tolerances measured in *microns*. The injectors and high-pressure pump are lubricated *only* by the diesel fuel itself. A single particle of silica (dirt) or metal (from wear) that is larger than 5 microns will instantly “score” the injector needle or pump piston, leading to a catastrophic, multi-thousand-dollar failure. This “fine filter” is the “gatekeeper” that ensures this *never* happens.

This technical guide is an essential resource for engine technicians, fleet maintenance managers, and parts specialists. We will deconstruct the entire 4-component-type group of the FAW J6P Fuel Fine Filter. We will analyze the “Absolute Filtration Logic” (the replaceable spin-on elements), the “Flow & Interface Logic” (the main filter base), the “Structural Support Logic” (the anti-vibration bracket), and the “Sealing & Fastener Logic” that holds the assembly together and ensures a leak-proof seal.

Core 1: The “Absolute Filtration” Logic (Component 1117050-73D)

This is the “working” component of the FAW J6P Fuel Fine Filter assembly. This is the replaceable cartridge that does the actual cleaning.

1. Component: ‘Spin-on diesel filter element assy’ (1117050-73D)
The list calls for two (2) of these “spin-on” cartridges, which are part of the main ‘Fuel fine filter assy’ (1117010-73D). This “Dual Filter Logic” is a high-capacity design. The fuel likely flows in “parallel” (splitting between both filters) or “in-series” (passing through one, then the other) for multi-stage filtration.

The “Micro-Filtration Logic” is what defines this component. A standard “primary” filter/water separator might filter down to 30 microns. This FAW J6P Fuel Fine Filter is an “absolute” filter, meaning its media (often a synthetic, multi-layer, high-density composite) is rated to stop *99.9%* of all particles 2 to 5 microns in size. This “Absolute Logic” is the *only* thing that protects the micron-level tolerances of the HPCR injectors from being destroyed by abrasive “silt” (fine dirt) or metal particles.

The “Service Logic” of this FAW J6P Fuel Fine Filter is its “spin-on” design. The entire cartridge (housing and media) is a single, disposable unit. This ensures that a technician cannot accidentally introduce dirt into the “clean” side of the housing during a filter change, which is a major risk with cartridge-style (drop-in) filters.

Core 2: The “Housing & Flow” Logic (Components 1117020-53D, 1117038-60D)

This group forms the “docking station” for the filter elements and manages the flow of fuel in and out of the FAW J6P Fuel Fine Filter.

1. Component: ‘Fuel fine filter base assy’ (1117020-53D)
This component (part of Comp 1) is the “Fluid Path Logic.” It is a heavy-duty, cast-aluminum housing. Its “logic” is to provide all the necessary ports: a “dirty” inlet port (from the primary filter/tank), two threaded “docks” for the spin-on filters (Comp 1117050-73D), and a “clean” outlet port (which feeds the high-pressure pump). This base is the central “manifold” that directs the flow of fuel through the FAW J6P Fuel Fine Filter.

2. Component: ‘Hollow bolt’ (1117038-60D)
The list calls for two (2) of these “hollow bolts” (banjo bolts). This is the “Fluid Interface Logic.” These bolts are *how* the fuel gets in and out of the ‘Filter base’ (Comp 1). A fuel line “banjo” fitting slides over the bolt, and the bolt is then threaded into the base. The “hollow” “logic” (a hole through the center and a cross-drilled hole) allows fuel to flow *through* the bolt itself.

3. Component: ‘Gasket’ (CQ72316T5)
The list calls for four (4) of these (Comp 1). This is the “High-Pressure Sealing Logic” for the hollow bolts. These are “crush washers” (likely copper or aluminum). Two (2) gaskets are used *per bolt* (one on top, one on the bottom of the banjo fitting). Their “logic” is to deform when the hollow bolt is tightened, creating a perfect, leak-proof, diesel-resistant seal. Re-using these washers will almost certainly result in a fuel leak, which is a major fire hazard.

Core 3: The “Structural Support” Logic (Component 3)

This component’s “logic” is to protect the entire FAW J6P Fuel Fine Filter assembly from self-destruction via engine vibration.

1. Component: ‘Fuel fine filter support’ (1117121-59D)
This (Comp 3) is the “Anti-Vibration Logic.” A heavy filter assembly (like this dual-canister FAW J6P Fuel Fine Filter), full of fuel, cannot just “hang” off the engine block by its aluminum housing. The intense vibration of a heavy-duty diesel engine would cause the aluminum base (Comp 1) to “fatigue” and crack in a very short time, causing a massive fuel leak.

The “logic” of this “support” bracket is to act as a heavy-duty “brace.” It bolts to the ‘Filter base’ (Comp 1) and *also* to a rigid point on the engine block. This “triangulation” “logic” creates a robust, vibration-resistant “foundation” that holds the entire FAW J6P Fuel Fine Filter assembly securely in place, preventing cracks and leaks. Piston

Core 4: The “Fastener” Logic (Components 2, 4)

This final group’s “logic” is to provide the “clamping force” that holds the FAW J6P Fuel Fine Filter assembly together and to the engine.

1. Components: ‘Combination bolt’ (CQ1461030) & (CQ1420820)
The list calls for a total of four (4) of these ‘Combination bolts’ (Comp 2 & 4). These are the “Mounting Logic” fasteners.

The “Combination Logic” means these are bolts with a pre-attached, captive “washer” (usually a spring/lock washer). This “logic” is superior for two reasons: 1) It’s a “serviceability” logic, as the technician cannot forget or drop the washer. 2) It is a “vibration-proof” logic. The spring washer provides a constant “preload” or “tension,” which prevents the bolt from “walking” loose under the engine’s constant vibration. These bolts are what secure the ‘Support’ (Comp 3) and ‘Filter base’ (Comp 1) to the engine block, completing the FAW J6P Fuel Fine Filter installation.

FAW J6P Fuel Fine Filter Parts List & Specifications

The following table provides the complete, detailed breakdown of all 4 component types identified in this FAW J6P Fuel Fine Filter assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Fuel Fine Filter are defined by its function as the final “polishing” filter for the HPCR system.